Fixed error in doc test

src/app.rs

@@ -298,7 +298,6 @@ impl App {
     ///                        .index(1)
     ///                        .help("Configuration file to use")))
     ///             // Additional subcommand configuration goes here, such as arguments...
-    /// )
     /// # .get_matches();
     /// ```
     pub fn subcommand(mut self, subcmd: App) -> App {

src/lib.rs

@@ -14,7 +14,7 @@
 //! After defining a list of possible valid arguments you get a list of matches that the user supplied at runtime. You can then use this list to
 //! determine the functioning of your program.
 //!
-//! # Example
+//! Example:
 //! 
 //! ```no_run
 //! use clap::{Arg, App, SubCommand};